STIGQter: STIG Summary: Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide Version: 2 Release: 6 Benchmark Date: 01 Jul 2026:

Successful/unsuccessful modifications to the "lastlog" file in TOSS must generate an audit record.

DISA Rule

SV-253039r991578_rule

Vulnerability Number

V-253039

Group Title

SRG-OS-000470-GPOS-00214

Rule Version

TOSS-04-031130

Severity

CAT II

CCI(s)

• CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.

Weight

10

Fix Recommendation

Configure the audit system to generate an audit event for any successful/unsuccessful modifications to the "lastlog" file by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file:

-w /var/log/lastlog -p wa -k logins

The audit daemon must be restarted for the changes to take effect.

Check Contents

Verify TOSS generates an audit record when successful/unsuccessful modifications to the "lastlog" file by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -w lastlog /etc/audit/audit.rules

-w /var/log/lastlog -p wa -k logins

If the command does not return a line, or the line is commented out, this is a finding.

Vulnerability Number

V-253039

Documentable

False

Rule Version

TOSS-04-031130

Severity Override Guidance

Verify TOSS generates an audit record when successful/unsuccessful modifications to the "lastlog" file by performing the following command to check the file system rules in "/etc/audit/audit.rules":

$ sudo grep -w lastlog /etc/audit/audit.rules

-w /var/log/lastlog -p wa -k logins

If the command does not return a line, or the line is commented out, this is a finding.

Check Content Reference

M

Target Key

5469